Wet and Dry Process Application

Whether in the wet or dry process fields of cast iron enamelling there would seem to be need for improvement in the smoothness and soundness of castings. Efforts to this end could well make the use of recent enamel developments more profitable for the enameller, for what is the use of greater covering power, for example, in an enamel, if it is still necessary to apply a thick coating to obtain a smooth finish?